{
  "cveId": "CVE-2021-47342",
  "url": "https://patchblox.com/security/cve/CVE-2021-47342",
  "summary": "CVE-2021-47342 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47342, released May 21, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ext4: fix possible UAF when remounting r/o a mmp...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ext4: fix possible UAF when remounting r/o a mmp-protected file system  After commit 618f003199c6 (\u0022ext4: fix memory leak in ext4_fill_super\u0022), after the file system is remounted read-only, there is a race where the kmmpd thread can exit, causing sbi-\u003Es_mmp_tsk to point at freed memory, which the call to ext4_stop_mmpd() can trip over.  Fix this by only allowing kmmpd() to exit when it is stopped via ext4_stop_mmpd().  Bug-Report-Link: \u003C20210629143603.2166962-1-yebin10@huawei.com\u003E",
  "published": "2024-05-21T15:15:20Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00245,
  "epssPercentile": 0.15813,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47342",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47342",
      "released": "2024-05-21T15:15:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47342",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47342",
      "released": "2024-05-21T15:15:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47342",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47342",
      "released": "2024-05-21T15:15:20Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}